info:eu-repo/semantics/article
Trichothecene genotype and genetic variability of Fusarium graminearum and F. cerealis isolated from durum wheat in Argentina
Fecha
2017-12Registro en:
Palacios, Sofia Alejendra; Giaj Merlera, Guillermo; Erazo, Jessica Gabriela; Reynoso, Maria Marta; Farnochi, Maria Cecilia; et al.; Trichothecene genotype and genetic variability of Fusarium graminearum and F. cerealis isolated from durum wheat in Argentina; Springer; European Journal of Plant Pathology; 149; 4; 12-2017; 969-981
0929-1873
1573-8469
CONICET Digital
CONICET
Autor
Palacios, Sofia Alejendra
Giaj Merlera, Guillermo
Erazo, Jessica Gabriela
Reynoso, Maria Marta
Farnochi, Maria Cecilia
Torres, Adriana Mabel
Resumen
Fusarium head blight (FHB) is one of the most important fungal diseases affecting wheat worldwide and it is caused mainly by species within the Fusarium graminearum species complex (FGSC). This study evaluated the presence of FGSC in durum wheat from the main growing area in Argentina and analyzed the trichothecene genotype and chemotype of the strains isolated. Also, the genetic variability of the strains was assayed using ISSR markers. Molecular analysis revealed that among the strains isolated and identified morphologically as F. graminearum, there were 14 strains identified as F. cerealis. Also, it revealed that durum wheat grains were mostly contaminated by F. graminearum, being this the only species reported so far, within the FGSC, affecting durum wheat in Argentina. Analysis of molecular variance (AMOVA) indicated a high genetic variability within rather than between F. graminearum populations. All F. graminearum strains presented 15ADON genotype and were able to produce DON while all F. cerealis strains presented the NIV genotype and most of them were able to produce this toxin. The finding of F. cerealis in durum wheat grains indicates the need for investigating if this fungus is the responsible for the NIV contamination found in wheat in Argentina.